Capital Gains Tax Calculator

Calculate your UK Capital Gains Tax across shares, funds, crypto, and residential property. Model multiple disposals, apply current-year and brought-forward losses, then see your tax after the annual exemption.

2025/26 Tax Year
Shares/Funds/Crypto
Residential Property
£3,000 Annual Exemption

Capital Gains Inputs

£
£

Disposals

£
£
£
£

Gain/Loss

£8,700.00

£
£
£
£

Gain/Loss

£8,800.00

Taxable Gains

£14,500

After losses + annual exemption

Remaining Basic Band

£20,270

Used for lower CGT rates first

Calculation Breakdown

Gains (Other Assets)£8,700
Gains (Residential Property)£8,800
Total Gains Before Losses£17,500
Current-Year Losses Used-£0
Brought-Forward Losses Used-£0
Gains After Losses£17,500
Annual Exempt Amount Used-£3,000
Taxable Gains After AEA£14,500

Other Assets CGT (10% / 20%)

Basic-rate portion£7,208.57
Higher-rate portion£0.00
Tax @ 10%£720.86
Tax @ 20%£0.00

Residential CGT (18% / 24%)

Basic-rate portion£7,291.43
Higher-rate portion£0.00
Tax @ 18%£1,312.46
Tax @ 24%£0.00

How CGT Is Calculated

CGT is based on your net gain: disposal proceeds minus acquisition cost, allowable costs, and reliefs. You can then offset allowable losses and apply your annual exempt amount before rates are applied.

Your taxable income matters because it determines how much of your remaining basic-rate band is available for lower CGT rates.

CGT Rates for 2025/26

Asset TypeLower RateHigher Rate
Shares/Funds/Crypto10%20%
Residential Property18%24%

Losses and Planning Tips

Use losses first

Report and claim losses so they can reduce gains now and in future years.

Use annual exemption every year

Spreading disposals across tax years can help use multiple annual exemptions.

Monitor income bands

A higher taxable income leaves less basic-rate band for lower CGT rates.

Property deadlines matter

Residential property disposals with CGT due usually require 60-day reporting/payment.